A Holybro Telemetry Radio is a small, light and inexpensive open source radio platform that typically allows ranges of better than 300m “out of the box” (the range can be extended to several kilometres with the use of a patch antenna on the ground). The radio uses open source firmware which has been specially designed to work well with MAVLink packets and to be integrated with the Mission Planner, Copter, Rover and Plane.
The radios can be either 915Mhz or 433Mhz and you should purchase the model which is appropriate for your country/region.

Status LEDsThe radios have 2 status LEDs, one red and one green. The meaning of the different LED states is:
Green LED blinking - searching for another radio
Green LED solid - link is established with another radio
Red LED flashing - transmitting data
Red LED solid - in firmware update mode

Connecting to Pixhawk4Use the 6 pin JST-GH connector that should have come with the radio to connect the radio to your Pixhawk4’s “Telem 1” (“Telem 2” can also be used but the default recommendation is “Telem1”).

Connecting to a PCConnecting the radio to your Windows PC is as simple as connecting the micro USB cable (which should have been included with the radio) to your PC. The necessary drivers should be installed automatically and the radio will appear as a new “USB Serial Port” in the Windows Device Manager under Ports (COM & LPT). The Mission Planner’s COM Port selection drop-down should also contain the same new COM port.

On Holybro Kopis 6S V2, the ESC installation direction has been changed while the power supply cord has been moved from the side of the quad to the tail, which will better protect the ESC. Kopis 6S V2 is equipped with a 1200TVL Foxeer Micro Razer FPV cam

The latest tekko32 45A 4in1 ESC has got some improvements on its performance：
1) Enhanced BEC, withstand voltage up to 80V.
2)The first blheli32 ESC in the market with default PWM output 96K giving you smoother and quieter experience.
3) Current meter

The latest tekko32 45A 4in1 ESC has got some improvements on its performance：
1) Enhanced BEC, withstand voltage up to 80V.
2)The first blheli32 ESC in the market with default PWM output 96K giving you smoother and quieter experience.
3) Current meter

Pixhawk​®​ 4 is the latest update to the successful family of Pixhawk flight controllers. It is designed and developed in collaboration with Holybro and Auterion, optimized to run PX4. It comes preinstalled with the latest PX4 firmware.

The latest tekko32 45A 4in1 ESC has got some improvements on its performance：
1) Enhanced BEC, withstand voltage up to 80V.
2)The first blheli32 ESC in the market with default PWM output 96K giving you smoother and quieter experience.
3) Current meter

Holybro Kakute F7 HDV is designed to work with the DJI FPV VTx module. The GH port available on the board makes it much more convenient for you to connect Holybro Kakute F7 HDV to the DJI FPV VTx, for both signal and power supply.